Thank you for reaching out to the Community. I'm here to assist you with your concern about importing products and services in QuickBooks Online.
Emailing the files to our Support Specialists for importing of data is currently unavailable at this time. Right now, your only option in uploading products and services is by splitting the records into multiple lists (1000 items per file).
For more insights, I'm adding the article I recommend on this down below:
Please feel free to get in touch with me here for any additional questions regarding the import functionality. The Community always has your back.
"I have 112,100 products "
QBO is not the right program for this quantity. It will be impossible to work with